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中文摘要：
通过溶胶-水热法合成纯的和不同量 Ni 离子掺杂的 TiO2纳米粒子，将其作为表面增强拉曼散射（ SERS）活性基底，研究了金属Ni掺杂对于纳米TiO2 SERS性能的改进。结果表明，适量的Ni掺杂能够在纳米TiO2的能隙中靠近导带底的位置形成丰富的掺杂能级，促进TiO2-to-molecule的电荷转移过程，进而提高纳米TiO2基底对吸附分子的SERS增强能力，显著改进纳米TiO2的SERS性能。
英文摘要：
Pure TiO2 and different amount Ni ions doped TiO2 nanoparticles were synthesized by a sol-hydro-thermal method and served as surface-enhanced Raman scattering（ SERS） active substrate. The improvement of SERS properties of TiO2 nanoparticles by metal Ni doping was mostly investigated. The results indicate that abundant metal doping energy levels can be formed near by the conduction band bottom in the energy gap of TiO2 by an appropriate amount Ni ions doping, which can promote the TiO2-to-molecule charge transfer process, and subsequently enhance SERS signals of adsorbed molecule on TiO2 substrate, and improve remarkably SERS properties of TiO2 nanoparticles.
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